已知,△ABC中,AB = BC = CA ,即:△ABC是等边三角形,
则有:BD是等边△ABC的中线,
可得:∠DBC = (1/2)∠ABC = 30° ;
已知,CE = CD ,
可得:∠DEC = ∠CDE = (1/2)∠ACB = 30° = ∠DBC ;
所以,DB = DE .
已知,△ABC中,AB = BC = CA ,即:△ABC是等边三角形,
则有:BD是等边△ABC的中线,
可得:∠DBC = (1/2)∠ABC = 30° ;
已知,CE = CD ,
可得:∠DEC = ∠CDE = (1/2)∠ACB = 30° = ∠DBC ;
所以,DB = DE .